An accurate reply.
6... h8g6 The game becomes sharp. Black has problems with the king, as it has no safe place to go to. But Black has good control of the center, and White also needs some time to castle on the kingside. 7. e2e3 Accelerating development. 7... c5b4  8. f1e2 White intends to castle, and Black has a problem with the king. 8... c8c5 The wrong plan.